Dry cell



G. VV'. HAZELETT.

' DRY CELL APPLICATION mfr; MAYQ, 1919.

DEEE' SELL -WQ Haznllnited States, residing county of Cuyahoga. iivented a ccrtain A* roi/'ement 'in llry Coils, lowing' is a fullv clear7 and exact description. i

This i vcntion relates to dry cells oit the type commonly known as midget cells, and to a process of' manufacturing the The usual niehod piusued in making these small cells consists ii forming or molding a i. consisting of manganese peroxide i5 and camion or graphite, inoisteoed with elec trclyto around a carhon rod. The molded .'oolihi "L as it is usually called, is tlien removed from the mold. Considerable care must he exercised in doingr this and in SubscH l'l quent l andling oi the hclohin, the mix is easily loosened and lmoclfod ofi; vThe lcobbin is then Wrapped in thin checsecloth which is bound thereto by moans oi" string or 'thread Wrmped around the cartridge, or hy ineaios hands. The wrapped hobloin is med inV :i zinc can having a small miste iii the 'lc-ottoni. As

i 'the can the pasto is the hobhin to 'fill the space and liohloin. The cell is at the upper end oy applying a piilplioard collar, a of a pit-cli or ,ther seal. A clicesecloth used for the purpose ci? ."5 the ini'i' prevent it from roachis to lifeb llith 'this con rely thick paste-l layer is Secure satisfactory disi'fzc oli the cartridgo n; mailer.

thc present invention is to disadvantages incident to its use. l5 llllvlior objects will aplicar in the followition. ilrawingsz-- ai cross sectional View of the Wood checsecloth which replaces the 5G tri-wiping. 4

Fig. il is a cross section of a mold rfor holding` the cy joder.

Fig. 2:3 a front View of a bobhin corn-prising the wood cylinder.

Spcccotion of Letters Tatent.

would cause local? lra'onted an.' Till, i922.

Serial No. :235,S85.

Fig. l; is cross sectional View of a comu 55 plated battery.

fliccording to the invention l use a Wood cylin r l a. retainer for the mix oi the cell. The cylinder is made from any suitT ably shaped rod of a porous grained woo'dxfO such lynn Wood, cypress, cedaro'r yucca, which has heen treated in acid or alkali to remove the resiuous constituents and render the Wood porous. Such cylinders are readily and cheaply made on an automatic screw machine which lirst hores out a hollow space Q, leaving a conical depression 3 due to the point of the `idiill. A supporting arbor is then insertedl in the cylinder, and the outside turned down to the 'proper size, the method permitting a Wall 4 to be made astliin as desired. The cylinder is then out off beyond the depression Seto provide a bottom` member 5 and a small projeating-wipv 6. @n account of the cylindrical Shape and the presence of the bottoni member, the cylin-v ders are quite strong and will withstand con-4 siderable handling. llt Will -also-lpefguhderstood that the acid 0r alkali treatment may he carried on when tlioffcylinde'rs are com- 89 pl/05' if desired, instead of treating the r nal Wood rods'.-

have found that Wooden cylinders made in this manner may he turned out with Walls as thin as two one-hundredths of an' inch, 85 and that this thickness of Wood is iinper yious to the mix and sufiiciently porous to contain considdrahle electrolyte for conduct'- ing the current in order to :fill the cylinder with mix it 90 will ho fitted in a suitable hollow cylindrical mold 7. The electrode 8 Wil-l he held or spaced in. the cylinder loy any Suitable ineens` and the mix 9 will then be tam'pcd around the carbon rod in the usual manner. Tho depression i3 in the bottom of the cylinder serves as a moans. for properly conter-W ing the lower end of the electrode. A paper disk l() is then iitted over the mix `and the loololoin removed from the lmold. @n ac..` 100 Vcount of the mix being 'enclosed in the The bohloin. formed in this manner is them 305- inserted in a zinc can ll having:Y a quantity of ypaste in the bottom. The paste 1s orccdl up around the cylinder, providing n. layer l2 filling the space therebetween. The cell is then completed hy fitting a pulpboard collar 13 in the can over the bobbin and applying a layer of sand 14 and a pitch seal 15 over the I pulpboard collar in the usual manner.

The tamping ot the mix in a Wooden cylindex' eliminates the tedious and troublesome operation of wrapping' the bobbins in cheesecloth and at all times holds the mix so that it will not. be knocked oil'. l have also Jfound that the corrosion of the zinc can is more uniform than with checsecloth Wrapped bobbins.

Having described my invention. what I claim is:

l. The steps in the process of 'manufacturing dry cells which consist in fitting a thin Walled porous tube in a mold, locating the carbon electrode in the tube, compressing a mix in the tube around the cwrl'rn electrode and then removing the article thus formed from the mold.

2. The steps in the process of manufacturing dry cells, which consist. in fittingetV wooden cylinder having a bottom in a mol centrall \v locating a carbon rod in thc `vlinder, tamping a mix in the cylinder :Av nd the carbon rod and removingr the article thus Jformed from the mold.

3. The steps in the process of manufacturingdry cells, which consist in fitting a p01*.- ous wooden cylinder closed at one end in a mold. locating a carbon rod centrally in the cylindeig'tamping a mix around the carbon rod to till the cylinder, removing the article thus formed from the mold and inserting it in' a zinc container electrode.

In testimony whereof, l hereunto affix my signature'.

o. W. HAZELETT. 

